The company said its previous investigation had been too narrow, centering on accounts already identified by American intelligence agencies.[...]

The social network agrees to open a full-and-proper investigation into Russia-backed activity during the UK's 2016 EU Referendum.[...]

The social network agrees to reopen its investigation after initially saying it found only a minimal amount of UK-related activity.[...]

Facebook Inc. is expanding a U.K. investigation into possible interference by Russia ahead of the country’s 2016 election to exit the European Union, after facing pressure from lawmakers who were unsatisfied with an earlier probe by the social media company.[...]

The firm is to look again at whether Russian groups used social media to try to influence the 2016 poll.[...]

After UK lawmakers were unimpressed with the results of Facebook's investigation into Russian influence into the country's Brexit referendum campaign, the company said it would broaden its probe. In a letter to a parliamentary committee, Facebook said it had initially focused its investigation on a cluster of accounts identified as being run by the Internet Research...[...]

Facebook will expand its investigation into whether Russian agents attempted to influence the Brexit vote. The social media site told the Government's fake news inquiry it will search for 'clusters engaged in coordinated activity around the Brexit referendum' which appear to have originated i...[...]

A UK electoral body had asked Facebook to look at accounts identified as part of Russia's 'Internet Research Agency' of trolls and propagandists.
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Tech giant looks into spreading of disinformation after MPs criticised scope of first investigation[...]